help on taglib and properties file in struts?

Greenhorn

Posts: 11

posted 18 years ago

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Hi everyone! I'm new to struts and i just can't figure out why tomcat's giving me an error. I've manage to run a simple example but when i use the bean:message tag i get this error

ERROR IS:

java.lang.NullPointerException
org.apache.struts.taglib.TagUtils.retrieveMessageResources(TagUtils.java:1175)
org.apache.struts.taglib.TagUtils.message(TagUtils.java:1038)
org.apache.struts.taglib.bean.MessageTag.doStartTag(MessageTag.java:224)
org.apache.jsp.index_jsp._jspx_meth_bean_message_0(org.apache.jsp.index_jsp:135)
org.apache.jsp.index_jsp._jspx_meth_html_html_0(org.apache.jsp.index_jsp:101)
org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:69)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

Can anyone help me with this problem?
my ApplicationResources.propeties file is in WEB-INF/classes

index.jsp

web.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE web-app
  PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
  "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
 
<web-app>
  
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    
    
    <init-param>
      <param-name>application</param-name>
      <param-value>ApplicationResources</param-value>
    </init-param>
 
      
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
 
    
    <init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
    </init-param>
 
    <init-param>
<param-name>detail</param-name>
<param-value>2</param-value>
    </init-param>
 
    <load-on-startup>1</load-on-startup>
  </servlet>
 
  
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
 

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
 
  
  <taglib>
    <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
  </taglib>
 
  <taglib>
    <taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
  </taglib>
 
  <taglib>
    <taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
  </taglib>
 
  
  <taglib>
    <taglib-uri>/WEB-INF/app.tld</taglib-uri>
    <taglib-location>/WEB-INF/app.tld</taglib-location>
  </taglib>
 
</web-app>

ApplicationResources.properties

struts-config.xml

PLEASE HELP...THANKS

Shailesh Pillai

Ranch Hand

Posts: 78

posted 18 years ago

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Hi Mona,
Let me tell you that you have not mentioned any - form-beans or action-mapping in your struts-config.xml.

I suggest you better go through a good struts book and try out a simple example mentioned in it.

Try out the simple example in the ebook by Shreekanth Shenoy.
http://www.objectsource.com

Regards,
Shailesh
[ April 27, 2006: Message edited by: Shailesh Pillai ]

Merrill Higginson

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Posts: 4864

posted 18 years ago

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This message indicates that Struts can't find your ApplicationResources.properties file. Given the entry in your struts-config.xml file, it should be in the WEB-INF/classes directory.

Merrill
Consultant, Sima Solutions

jaffar muzaffar

Greenhorn

Posts: 2

posted 18 years ago

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Hi Mona,
it seems ur error is due to lack of mappings.U have to include mappings in ur struts-config.tld file.It would be easier to go through "Mastering Jakarta struts 1.0" by james goodwill.It gives a good idea of the execution steps.Plus U have to take care of cases in names and also the web.xml file.
So Have a look at the book.
Any more help required...
let me know
cheers

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